英制螺纹规格表

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1、英制普通螺纹(惠氏螺纹)--小螺纹系列(BA)名义尺寸牙型代号大径螺距每英寸牙数中径小径牙型高底孔直径No.14BA10.23110.40.860.720.140.75No.13BA1.20.25101.61.050.90.150.95No.12BA1.30.2890.711.130.960.171No.11BA1.50.3181.931.3151.130.1851.2No.10BA1.70.3572.571.491.280.211.35No.9BA1.90.3965.121.6651.430.2351.5No.8BA2.20.4359

2、.071.941.680.261.8No.7BA2.50.4852.922.211.920.292No.6BA2.80.5347.922.482.160.322.3No.5BA3.20.5943.052.8452.490.3552.6No.4BA3.60.6638.483.2052.810.3952.95No.3BA4.10.7334.793.663.220.443.4No.2BA4.70.8131.354.2153.730.4853.9No.1BA5.30.928.224.764.220.544.4No.0BA6125.45.44.8

3、0.6555°圆锥管螺纹型式和尺寸基本尺寸大径螺距每英寸牙数中径小径牙型高圆弧尺寸底孔尺寸螺纹代号英寸mmmmtpimm外螺纹H1rmmd=Dpd2=D2d3R1/161/16＂7.720.907287.1426.5610.5810.1256.4R1/81/8＂9.730.907289.1478.5660.5810.1258.4R1/41/4＂13.21.3371912.30111.450.8560.18411.2R3/83/8＂16.71.3371915.80614.950.8560.18414.75R1/21/2＂211.81414

4、19.79318.631.1620.24918.25R3/43/4＂26.41.8141425.27924.121.1620.24923.75R11＂33.22.3091131.7730.291.4790.31730R11/411/4＂41.92.3091140.43138.951.4790.31738.5R11/211/2＂47.82.3091146.32444.851.4790.31744.5R22＂59.62.3091158.13556.661.4790.31756R21/221/2＂75.22.3091173.70572.231

5、.4790.31771R33＂87.92.3091186.40584.931.4790.31785.5R44＂1132.30911111.55110.11.4790.317110.5R55＂1382.30911136.95135.51.4790.317136R66＂1642.30911162.35160.91.4790.317161.5RC2英寸锥管螺纹，每英寸11牙，螺距=25.4/11即2.309，牙高（深）=2.309×0.64即1.479，锥度是固定的即1：16，R等于1/32乘以长度，1/32意思是，锥螺纹的锥度是1：16，单

6、边就是1：32，长度意思是：定位点加有效长度，比如我定位3.0，有效长度是12.0，R=1/32X（3+12）=0.46875英制普通螺纹(惠氏螺纹)--粗牙(BSW)名义尺寸大径螺距每英寸牙数中径小径牙型高底孔直径Ww牙型代号mmmmtpimm外螺纹H1mmd=Dpd2=D2d31/16＂BSW1.590.423601.3151.050.271.153/32＂BSW2.380.529482.0411.7030.3381.91/8＂BSW3.180.635402.7682.3620.4062.55/32＂BSW3.970.793323.

7、4592.9520.5073.23/16＂BSW4.761.058244.0843.4070.6773.77/32＂BSW5.561.058244.8784.2010.6774.51/4＂BSW6.351.27205.5374.7240.8135.15/16＂BSW7.941.411187.0346.1310.9046.53/8＂BSW9.531.588168.5097.4921.0177.97/16＂BSW11.11.814149.9518.7891.1629.21/2＂BSW12.72.1171211.3459.991.35510.

8、45/8＂BSW15.92.3091114.39712.921.47913.43/4＂BSW19.12.541017.42415.81.62716.257/8＂BSW22.22.822920.41918.6